A minor update to this patch is attached. The rest of the series is
unchanged and rebased cleanly on 4.17-rc2 on my system.
Regards,
Felix
On 2018-04-10 05:33 PM, Felix Kuehling wrote:
> Signed-off-by: Felix Kuehling <felix.kuehl...@amd.com>
> ---
> drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c | 10 +++++++++
> drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c | 25
> +++++++++++++++++------
> drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.h | 7 ++++++-
> drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_cik.c | 9 ++++++++
> drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_v9.c | 9 ++++++++
> drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_vi.c | 9 ++++++++
> drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 1 +
> 7 files changed, 63 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c
> b/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c
> index 36c9269e..5d7cccc 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c
> @@ -214,6 +214,16 @@ void write_kernel_doorbell(void __iomem *db, u32 value)
> }
> }
>
> +void write_kernel_doorbell64(void __iomem *db, u64 value)
> +{
> + if (db) {
> + WARN(((unsigned long)db & 7) != 0,
> + "Unaligned 64-bit doorbell");
> + writeq(value, (u64 __iomem *)db);
> + pr_debug("writing %llu to doorbell address 0x%p\n", value,
> db);+ }
> +}
> +
> unsigned int kfd_doorbell_id_to_offset(struct kfd_dev *kfd,
> struct kfd_process *process,
> unsigned int doorbell_id)
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c
> b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c
> index 9f38161..476951d 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c
> @@ -99,7 +99,7 @@ static bool initialize(struct kernel_queue *kq, struct
> kfd_dev *dev,
> kq->rptr_kernel = kq->rptr_mem->cpu_ptr;
> kq->rptr_gpu_addr = kq->rptr_mem->gpu_addr;
>
> - retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->wptr_kernel),
> + retval = kfd_gtt_sa_allocate(dev, dev->device_info->doorbell_size,
> &kq->wptr_mem);
>
> if (retval != 0)
> @@ -208,6 +208,7 @@ static int acquire_packet_buffer(struct kernel_queue *kq,
> size_t available_size;
> size_t queue_size_dwords;
> uint32_t wptr, rptr;
> + uint64_t wptr64;
> unsigned int *queue_address;
>
> /* When rptr == wptr, the buffer is empty.
> @@ -216,7 +217,8 @@ static int acquire_packet_buffer(struct kernel_queue *kq,
> * the opposite. So we can only use up to queue_size_dwords - 1 dwords.
> */
> rptr = *kq->rptr_kernel;
> - wptr = *kq->wptr_kernel;
> + wptr = kq->pending_wptr;
> + wptr64 = kq->pending_wptr64;
> queue_address = (unsigned int *)kq->pq_kernel_addr;
> queue_size_dwords = kq->queue->properties.queue_size / 4;
>
> @@ -246,11 +248,13 @@ static int acquire_packet_buffer(struct kernel_queue
> *kq,
> while (wptr > 0) {
> queue_address[wptr] = kq->nop_packet;
> wptr = (wptr + 1) % queue_size_dwords;
> + wptr64++;
> }
> }
>
> *buffer_ptr = &queue_address[wptr];
> kq->pending_wptr = wptr + packet_size_in_dwords;
> + kq->pending_wptr64 = wptr64 + packet_size_in_dwords;
>
> return 0;
>
> @@ -272,14 +276,18 @@ static void submit_packet(struct kernel_queue *kq)
> pr_debug("\n");
> #endif
>
> - *kq->wptr_kernel = kq->pending_wptr;
> - write_kernel_doorbell(kq->queue->properties.doorbell_ptr,
> - kq->pending_wptr);
> + kq->ops_asic_specific.submit_packet(kq);
> }
>
> static void rollback_packet(struct kernel_queue *kq)
> {
> - kq->pending_wptr = *kq->wptr_kernel;
> + if (kq->dev->device_info->doorbell_size == 8) {
> + kq->pending_wptr64 = *kq->wptr64_kernel;
> + kq->pending_wptr = *kq->wptr_kernel %
> + (kq->queue->properties.queue_size / 4);
> + } else {
> + kq->pending_wptr = *kq->wptr_kernel;
> + }
> }
>
> struct kernel_queue *kernel_queue_init(struct kfd_dev *dev,
> @@ -310,6 +318,11 @@ struct kernel_queue *kernel_queue_init(struct kfd_dev
> *dev,
> case CHIP_HAWAII:
> kernel_queue_init_cik(&kq->ops_asic_specific);
> break;
> +
> + case CHIP_VEGA10:
> + case CHIP_RAVEN:
> + kernel_queue_init_v9(&kq->ops_asic_specific);
> + break;
> default:
> WARN(1, "Unexpected ASIC family %u",
> dev->device_info->asic_family);
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.h
> b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.h
> index 5940531..97aff20 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.h
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.h
> @@ -72,6 +72,7 @@ struct kernel_queue {
> struct kfd_dev *dev;
> struct mqd_manager *mqd;
> struct queue *queue;
> + uint64_t pending_wptr64;
> uint32_t pending_wptr;
> unsigned int nop_packet;
>
> @@ -79,7 +80,10 @@ struct kernel_queue {
> uint32_t *rptr_kernel;
> uint64_t rptr_gpu_addr;
> struct kfd_mem_obj *wptr_mem;
> - uint32_t *wptr_kernel;
> + union {
> + uint64_t *wptr64_kernel;
> + uint32_t *wptr_kernel;
> + };
> uint64_t wptr_gpu_addr;
> struct kfd_mem_obj *pq;
> uint64_t pq_gpu_addr;
> @@ -97,5 +101,6 @@ struct kernel_queue {
>
> void kernel_queue_init_cik(struct kernel_queue_ops *ops);
> void kernel_queue_init_vi(struct kernel_queue_ops *ops);
> +void kernel_queue_init_v9(struct kernel_queue_ops *ops);
>
> #endif /* KFD_KERNEL_QUEUE_H_ */
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_cik.c
> b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_cik.c
> index a90eb44..19e54ac 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_cik.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_cik.c
> @@ -26,11 +26,13 @@
> static bool initialize_cik(struct kernel_queue *kq, struct kfd_dev *dev,
> enum kfd_queue_type type, unsigned int queue_size);
> static void uninitialize_cik(struct kernel_queue *kq);
> +static void submit_packet_cik(struct kernel_queue *kq);
>
> void kernel_queue_init_cik(struct kernel_queue_ops *ops)
> {
> ops->initialize = initialize_cik;
> ops->uninitialize = uninitialize_cik;
> + ops->submit_packet = submit_packet_cik;
> }
>
> static bool initialize_cik(struct kernel_queue *kq, struct kfd_dev *dev,
> @@ -42,3 +44,10 @@ static bool initialize_cik(struct kernel_queue *kq, struct
> kfd_dev *dev,
> static void uninitialize_cik(struct kernel_queue *kq)
> {
> }
> +
> +static void submit_packet_cik(struct kernel_queue *kq)
> +{
> + *kq->wptr_kernel = kq->pending_wptr;
> + write_kernel_doorbell(kq->queue->properties.doorbell_ptr,
> + kq->pending_wptr);
> +}
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_v9.c
> b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_v9.c
> index ece7d59..684a3bf 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_v9.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_v9.c
> @@ -29,11 +29,13 @@
> static bool initialize_v9(struct kernel_queue *kq, struct kfd_dev *dev,
> enum kfd_queue_type type, unsigned int queue_size);
> static void uninitialize_v9(struct kernel_queue *kq);
> +static void submit_packet_v9(struct kernel_queue *kq);
>
> void kernel_queue_init_v9(struct kernel_queue_ops *ops)
> {
> ops->initialize = initialize_v9;
> ops->uninitialize = uninitialize_v9;
> + ops->submit_packet = submit_packet_v9;
> }
>
> static bool initialize_v9(struct kernel_queue *kq, struct kfd_dev *dev,
> @@ -58,6 +60,13 @@ static void uninitialize_v9(struct kernel_queue *kq)
> kfd_gtt_sa_free(kq->dev, kq->eop_mem);
> }
>
> +static void submit_packet_v9(struct kernel_queue *kq)
> +{
> + *kq->wptr64_kernel = kq->pending_wptr64;
> + write_kernel_doorbell64(kq->queue->properties.doorbell_ptr,
> + kq->pending_wptr64);
> +}
> +
> static int pm_map_process_v9(struct packet_manager *pm,
> uint32_t *buffer, struct qcm_process_device *qpd)
> {
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_vi.c
> b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_vi.c
> index f9019ef..bf20c6d 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_vi.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_vi.c
> @@ -29,11 +29,13 @@
> static bool initialize_vi(struct kernel_queue *kq, struct kfd_dev *dev,
> enum kfd_queue_type type, unsigned int queue_size);
> static void uninitialize_vi(struct kernel_queue *kq);
> +static void submit_packet_vi(struct kernel_queue *kq);
>
> void kernel_queue_init_vi(struct kernel_queue_ops *ops)
> {
> ops->initialize = initialize_vi;
> ops->uninitialize = uninitialize_vi;
> + ops->submit_packet = submit_packet_vi;
> }
>
> static bool initialize_vi(struct kernel_queue *kq, struct kfd_dev *dev,
> @@ -58,6 +60,13 @@ static void uninitialize_vi(struct kernel_queue *kq)
> kfd_gtt_sa_free(kq->dev, kq->eop_mem);
> }
>
> +static void submit_packet_vi(struct kernel_queue *kq)
> +{
> + *kq->wptr_kernel = kq->pending_wptr;
> + write_kernel_doorbell(kq->queue->properties.doorbell_ptr,
> + kq->pending_wptr);
> +}
> +
> unsigned int pm_build_pm4_header(unsigned int opcode, size_t packet_size)
> {
> union PM4_MES_TYPE_3_HEADER header;
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
> b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
> index 06b210b..10d5b54 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
> @@ -769,6 +769,7 @@ void __iomem *kfd_get_kernel_doorbell(struct kfd_dev *kfd,
> void kfd_release_kernel_doorbell(struct kfd_dev *kfd, u32 __iomem *db_addr);
> u32 read_kernel_doorbell(u32 __iomem *db);
> void write_kernel_doorbell(void __iomem *db, u32 value);
> +void write_kernel_doorbell64(void __iomem *db, u64 value);
> unsigned int kfd_doorbell_id_to_offset(struct kfd_dev *kfd,
> struct kfd_process *process,
> unsigned int doorbell_id);
>From 6ef689698ee1599a5c72e2fbfa3c1b6b5e532cd9 Mon Sep 17 00:00:00 2001
From: Felix Kuehling <felix.kuehl...@amd.com>
Date: Sun, 8 Apr 2018 22:03:51 -0400
Subject: [PATCH 1/1] drm/amdkfd: Add 64-bit doorbell and wptr support to
kernel queue
v2: Removed redundant 0x before %p.
Signed-off-by: Felix Kuehling <felix.kuehl...@amd.com>
---
drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c | 10 +++++++++
drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c | 25 +++++++++++++++++------
drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.h | 7 ++++++-
drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_cik.c | 9 ++++++++
drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_v9.c | 9 ++++++++
drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_vi.c | 9 ++++++++
drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 1 +
7 files changed, 63 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c b/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c
index 36c9269e..c3744d8 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c
@@ -214,6 +214,16 @@ void write_kernel_doorbell(void __iomem *db, u32 value)
}
}
+void write_kernel_doorbell64(void __iomem *db, u64 value)
+{
+ if (db) {
+ WARN(((unsigned long)db & 7) != 0,
+ "Unaligned 64-bit doorbell");
+ writeq(value, (u64 __iomem *)db);
+ pr_debug("writing %llu to doorbell address %p\n", value, db);
+ }
+}
+
unsigned int kfd_doorbell_id_to_offset(struct kfd_dev *kfd,
struct kfd_process *process,
unsigned int doorbell_id)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c
index 9f38161..476951d 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c
@@ -99,7 +99,7 @@ static bool initialize(struct kernel_queue *kq, struct kfd_dev *dev,
kq->rptr_kernel = kq->rptr_mem->cpu_ptr;
kq->rptr_gpu_addr = kq->rptr_mem->gpu_addr;
- retval = kfd_gtt_sa_allocate(dev, sizeof(*kq->wptr_kernel),
+ retval = kfd_gtt_sa_allocate(dev, dev->device_info->doorbell_size,
&kq->wptr_mem);
if (retval != 0)
@@ -208,6 +208,7 @@ static int acquire_packet_buffer(struct kernel_queue *kq,
size_t available_size;
size_t queue_size_dwords;
uint32_t wptr, rptr;
+ uint64_t wptr64;
unsigned int *queue_address;
/* When rptr == wptr, the buffer is empty.
@@ -216,7 +217,8 @@ static int acquire_packet_buffer(struct kernel_queue *kq,
* the opposite. So we can only use up to queue_size_dwords - 1 dwords.
*/
rptr = *kq->rptr_kernel;
- wptr = *kq->wptr_kernel;
+ wptr = kq->pending_wptr;
+ wptr64 = kq->pending_wptr64;
queue_address = (unsigned int *)kq->pq_kernel_addr;
queue_size_dwords = kq->queue->properties.queue_size / 4;
@@ -246,11 +248,13 @@ static int acquire_packet_buffer(struct kernel_queue *kq,
while (wptr > 0) {
queue_address[wptr] = kq->nop_packet;
wptr = (wptr + 1) % queue_size_dwords;
+ wptr64++;
}
}
*buffer_ptr = &queue_address[wptr];
kq->pending_wptr = wptr + packet_size_in_dwords;
+ kq->pending_wptr64 = wptr64 + packet_size_in_dwords;
return 0;
@@ -272,14 +276,18 @@ static void submit_packet(struct kernel_queue *kq)
pr_debug("\n");
#endif
- *kq->wptr_kernel = kq->pending_wptr;
- write_kernel_doorbell(kq->queue->properties.doorbell_ptr,
- kq->pending_wptr);
+ kq->ops_asic_specific.submit_packet(kq);
}
static void rollback_packet(struct kernel_queue *kq)
{
- kq->pending_wptr = *kq->wptr_kernel;
+ if (kq->dev->device_info->doorbell_size == 8) {
+ kq->pending_wptr64 = *kq->wptr64_kernel;
+ kq->pending_wptr = *kq->wptr_kernel %
+ (kq->queue->properties.queue_size / 4);
+ } else {
+ kq->pending_wptr = *kq->wptr_kernel;
+ }
}
struct kernel_queue *kernel_queue_init(struct kfd_dev *dev,
@@ -310,6 +318,11 @@ struct kernel_queue *kernel_queue_init(struct kfd_dev *dev,
case CHIP_HAWAII:
kernel_queue_init_cik(&kq->ops_asic_specific);
break;
+
+ case CHIP_VEGA10:
+ case CHIP_RAVEN:
+ kernel_queue_init_v9(&kq->ops_asic_specific);
+ break;
default:
WARN(1, "Unexpected ASIC family %u",
dev->device_info->asic_family);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.h b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.h
index 5940531..97aff20 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.h
@@ -72,6 +72,7 @@ struct kernel_queue {
struct kfd_dev *dev;
struct mqd_manager *mqd;
struct queue *queue;
+ uint64_t pending_wptr64;
uint32_t pending_wptr;
unsigned int nop_packet;
@@ -79,7 +80,10 @@ struct kernel_queue {
uint32_t *rptr_kernel;
uint64_t rptr_gpu_addr;
struct kfd_mem_obj *wptr_mem;
- uint32_t *wptr_kernel;
+ union {
+ uint64_t *wptr64_kernel;
+ uint32_t *wptr_kernel;
+ };
uint64_t wptr_gpu_addr;
struct kfd_mem_obj *pq;
uint64_t pq_gpu_addr;
@@ -97,5 +101,6 @@ struct kernel_queue {
void kernel_queue_init_cik(struct kernel_queue_ops *ops);
void kernel_queue_init_vi(struct kernel_queue_ops *ops);
+void kernel_queue_init_v9(struct kernel_queue_ops *ops);
#endif /* KFD_KERNEL_QUEUE_H_ */
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_cik.c b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_cik.c
index a90eb44..19e54ac 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_cik.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_cik.c
@@ -26,11 +26,13 @@
static bool initialize_cik(struct kernel_queue *kq, struct kfd_dev *dev,
enum kfd_queue_type type, unsigned int queue_size);
static void uninitialize_cik(struct kernel_queue *kq);
+static void submit_packet_cik(struct kernel_queue *kq);
void kernel_queue_init_cik(struct kernel_queue_ops *ops)
{
ops->initialize = initialize_cik;
ops->uninitialize = uninitialize_cik;
+ ops->submit_packet = submit_packet_cik;
}
static bool initialize_cik(struct kernel_queue *kq, struct kfd_dev *dev,
@@ -42,3 +44,10 @@ static bool initialize_cik(struct kernel_queue *kq, struct kfd_dev *dev,
static void uninitialize_cik(struct kernel_queue *kq)
{
}
+
+static void submit_packet_cik(struct kernel_queue *kq)
+{
+ *kq->wptr_kernel = kq->pending_wptr;
+ write_kernel_doorbell(kq->queue->properties.doorbell_ptr,
+ kq->pending_wptr);
+}
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_v9.c b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_v9.c
index ece7d59..684a3bf 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_v9.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_v9.c
@@ -29,11 +29,13 @@
static bool initialize_v9(struct kernel_queue *kq, struct kfd_dev *dev,
enum kfd_queue_type type, unsigned int queue_size);
static void uninitialize_v9(struct kernel_queue *kq);
+static void submit_packet_v9(struct kernel_queue *kq);
void kernel_queue_init_v9(struct kernel_queue_ops *ops)
{
ops->initialize = initialize_v9;
ops->uninitialize = uninitialize_v9;
+ ops->submit_packet = submit_packet_v9;
}
static bool initialize_v9(struct kernel_queue *kq, struct kfd_dev *dev,
@@ -58,6 +60,13 @@ static void uninitialize_v9(struct kernel_queue *kq)
kfd_gtt_sa_free(kq->dev, kq->eop_mem);
}
+static void submit_packet_v9(struct kernel_queue *kq)
+{
+ *kq->wptr64_kernel = kq->pending_wptr64;
+ write_kernel_doorbell64(kq->queue->properties.doorbell_ptr,
+ kq->pending_wptr64);
+}
+
static int pm_map_process_v9(struct packet_manager *pm,
uint32_t *buffer, struct qcm_process_device *qpd)
{
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_vi.c b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_vi.c
index f9019ef..bf20c6d 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_vi.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue_vi.c
@@ -29,11 +29,13 @@
static bool initialize_vi(struct kernel_queue *kq, struct kfd_dev *dev,
enum kfd_queue_type type, unsigned int queue_size);
static void uninitialize_vi(struct kernel_queue *kq);
+static void submit_packet_vi(struct kernel_queue *kq);
void kernel_queue_init_vi(struct kernel_queue_ops *ops)
{
ops->initialize = initialize_vi;
ops->uninitialize = uninitialize_vi;
+ ops->submit_packet = submit_packet_vi;
}
static bool initialize_vi(struct kernel_queue *kq, struct kfd_dev *dev,
@@ -58,6 +60,13 @@ static void uninitialize_vi(struct kernel_queue *kq)
kfd_gtt_sa_free(kq->dev, kq->eop_mem);
}
+static void submit_packet_vi(struct kernel_queue *kq)
+{
+ *kq->wptr_kernel = kq->pending_wptr;
+ write_kernel_doorbell(kq->queue->properties.doorbell_ptr,
+ kq->pending_wptr);
+}
+
unsigned int pm_build_pm4_header(unsigned int opcode, size_t packet_size)
{
union PM4_MES_TYPE_3_HEADER header;
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index 06b210b..10d5b54 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -769,6 +769,7 @@ void __iomem *kfd_get_kernel_doorbell(struct kfd_dev *kfd,
void kfd_release_kernel_doorbell(struct kfd_dev *kfd, u32 __iomem *db_addr);
u32 read_kernel_doorbell(u32 __iomem *db);
void write_kernel_doorbell(void __iomem *db, u32 value);
+void write_kernel_doorbell64(void __iomem *db, u64 value);
unsigned int kfd_doorbell_id_to_offset(struct kfd_dev *kfd,
struct kfd_process *process,
unsigned int doorbell_id);
--
2.7.4
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